Suspended between sculpture and pure optical phenomenon, this 1975 cast polyester resin circle by De Wain Valentine measures 87.6 centimeters in diameter and achieves the kind of luminous depth that has secured the artist's reputation as one of the great technical innovators of the Light and Space movement. The disc glows from within, its translucent resin capturing and refracting ambient light across its surface in ways that shift as the viewer moves, making the work as responsive to its environment as it is to its maker's intentions. Valentine spent years developing proprietary casting formulas in collaboration with industrial chemists, solving the problem of shrinkage and cracking that had made large-scale resin work nearly impossible, and this circle stands as direct evidence of that mastery. The choice of a circular form is not incidental. Valentine returned to the disc repeatedly throughout his career, understanding it as a shape that resists narrative and directs attention inward, toward color, light, and material presence rather than image or symbol. The modest thickness of the work, just over six centimeters, amplifies this effect by making the object feel simultaneously massive and weightless, a quality that aligns it closely with the phenomenological concerns driving Southern California artists of this period. Works by Valentine from the 1970s are increasingly sought by collectors who recognize that the Light and Space movement has moved well beyond regional significance and now occupies a central position in the broader history of postwar abstraction. Signed by the artist, this piece arrives without a frame, consistent with the convention for works of this type, which are typically presented directly against the wall to maximize their interaction with natural and artificial light. Condition and provenance should be confirmed through the offering house, Rago/Wright/LAMA/Toomey and Co., whose expertise in postwar and contemporary design places this work in appropriate context for serious collectors.